Insulation stripping device



March Z1, 1933. A. N. wx-:NTINK I* l 1,902,742

INSULATION STRIPPING DEVICE Filed Sept. 28, 1951 2 Sheets-Sheet l /////l////////////////,/ "WMZQ cc@ i5 vll/IIL INVENTOR HIS ATTORNEYS Mrchrzl', 1933.V

A. N. WENTINK INSULATION STRIPlING DEVICE Filed Sept. 28, 1931 2 Sheets-Sheet 2 HIS ATTORNEYS Patented 'Man 21,1933 j Y UNITED STATES PATEN'r OFFICE INSULATION sTRIrPING nnvrcn Application sled september 28, i931. serial No. 565,678;

This invention relates to certain novell Fig. 6 is a sectional View, partly in top improvements in insulation stripping deplan, on line 6-6 in Fig. 2; vices, and has for its principal object the Fig. g7 isa top plan view of a modification provision of an improved construction of of the invention;

5 this character which will be highly eiicient Fig. Sis asectional view on line 88 in in use and economical in manufacture. l Fig. 7; and

This invention relates to devices for strip- 1 Fig. 9 is a sectional .viewl on line 9-9 in ping insulation from electrical conductors F ig.4 7. v l f f so that an electrical connection may bernade ReferringV to the drawings, wherein the thereto and the invention represents certain preferred embodiments of the invention are improvements upon the device shown in my illustrated, and particularly now to Figs. 1

U. S. Patent 1,673,196, dated June 12, 1928. to 6 inclusive, 10 indicates a block forming 5 sulated4 conductor and means by which to Rotatably journaled in the base 10 is a pair at said point distant from the ends of the the full line position shown in Fig. 1. The

The present invention has among its obabase adapted toybe `mounted on a suitable jects the provision of means to grip the insupport, such as, 'foreXample, a workbench.

pull the same through the stripping knives, 0f posts 11 which carry,'at their outer ends, the latter being disclosed in the above men- Silllpplllg klllVeS 12 WhCh are SeCllled t0 the tioned patent, so as to strip the insulation heads 13 of the posts by screws or bolts 14. from the end of the conductor. Rlgidly secured to the inner. O'lOWeI ends i Another object of the invention is to proof the pOSJS are gFS `l5 Which meShWth vide means to grip the insulated conductor each other. The geaIS are, pIOVded With and mechanism associatedv therewith ,by Slots 16 whichco-operate with pins 17 that means of which to pull the insulated conproject from the base tolimit angular disductor between the stripping knives insuch placement of the posts about their respective a, lnanner that L predetermingd length 0f @X65 Of IOtLlOIl. A Spring 18 has lts ends the insulation may be stripped from the Seoulfedto the gearsby pins or screws 19 conductor between, or at a. point distant and 1S S0 COIISIllCted that it tends to rotate Y from, the ends thereof whereby anpelectrical the gears 15 and posts 11, in `unison or connection may be made to the conductor Synchronlsm, and t0 maintain the knives in Conductor, Y posts l1 may be displaced, against the action Other objects will` appear hereinafter. 0f the spring, to move the knVeS into the The invention consists in the novel com- .dotted 1in@ pOSlJOII Of Fig. 1.

bination and arrangement of parts to be MOUIled 011 il POS 20, which projects hereinafter described and claimed. above ,the base 10, by a bOlt 213ml pills 22, The invention will be best understood by 1S a bracket 23 in which S PIOVdGd il reference to the accompanying drawings thleidfbd Opening V24: IIO Which iS Screwed showing the preferred form of construction', 9 gudrlg *21111111113 25, the P1115 22 Preventmg and nwhch; turnltng ofdthe bracretasthe guirllle 25 is Fig. 1 is a top plan view'of a referred inset e an remover n eafih Oft e meet" form of construction ofthe inventigon; ing edges 26 of the. kun/es an. mdent (Flg Fig. 2 is a sectional view on line 2 2 in 1S ioimd to 'provlde an aperture 27 and m Fig. l use the insulated end portion of a conductor,

such, for example, as 57, 1s extended through 5v Flg- 3 1S a Sectionalvew' 0n 1in@ 3i-gin the guide 25 and between the-knives 12, 9.5

in Fig. 3; set-screw 29, in avporti'on 30. that projects Fig. 2 V

whereby the knlves 12 will be spread apart lgft is a Sectlonal WGW 011 1m@ 4 4111 turning with and on the posts `11. The endf 1% 3, y, of the conductor is then abutted `against a 41g. 5 1s a bottom plan view on line 5--5 gauge 28 which is adjustably mounted by a soV stripped from from the base; the gauge being previously adjusted so that the insulation will be a predetermined length of the conductor. The insulated conductor is then gripped and pulled back between the knives which then bite into the insulation to cut the same and strip a predetermined length -ofit from the conductor, the stripped portion being then pulled back through aperture 27 The means for gripping and pulling the conductor to `effect -thestripping operation constitute an improvement over my above identified patent and Vwill now be described and hereinafter claimed in combination with the knives and the means already described for constraining the knives yto rotate in unison.

A bearing post 31 is mounted on thel base 10 and movably mounted on the post 31, so that one end pivots thereabout, is an arm generally indicted at 32, this arm being urged into spring 33. n 34 ofthe arm 32 is a stationary block or gripping jaw 35 which has grippingV teeth 36 at its inner end, this block being adjustable on the shelf portion 34 of arm 32 toward and from the aperture 27 and clamped in an adjusted position by bolts or screws '37 which project through a slot 38 in the block and into threaded holes in the shelf A34, so as to vary the width of the space 39 between the stationary jaw 35 and a v,block or gripping jaw 40 which is Vmovable relative to the jaw 35. rlhe jaw 40 is provided with teeth adapted to co-operate with the teeth 36 to bite into and grip the insulated conductor in a manner hereinafter explained.

The bolts or screws 37 extend `through apertures -in a plate 41 that extends over the jaws 35 and 40 as a part V of the arm 32, said jaw 40 being movably mounted on vthe shelf 34 in a manner now to be. described. A slot 42 is provided in the plate 41 and slidable therein is a pin 43 carried by the jaw 40. A second slot 43m is providedV in the plate 41 `and movable therein is a pin 44 also carried by the jaw 40. Attached ,to the pin 44 openings is one end of a spring 46, the other end of which is attached to the shelf v34.

Rotatably and eccentrically mounted on the shelf 34 of arm 32, under vthe plate 41, and as at 47, is a cam48 in which is provided a threaded socket 49 for the reception of the threaded end portion 50 of a handle 51, the movement of which is limited by stops or bolts 52 and 53 that extend through in the plate 41 and are threaded into threaded openings in the shelf 34. A bumper .block v54 is mounted on the stop 52 and abuts astop inthe form of a boss 55 on the base 10 'when the handle V51 and arm 32 are infull line position of Fig. 1. The spring 46 tendsA to keep the slide block or Vgripping jaw40 spaced from sta-y full line position -of Fig. 1 by a` Adjustably mounted on a shelfV modification `is in the nonoperating position of Fig.

tionary gripping jawr 35, as in Fig. 1, and the spring 33 tends to keep the arm 32 in full line position of Fig. 1. The spring 46 therefore urges the the peripheral face 56 of the cam 48. When, therefore, an insulated wire is extended through the guide 25 and between the knives 12, the handle 51 is moved from full toward dotted line position of Fig. 1, thereby rotating the eccentric cam 48 which abuts the slidable gripping jaw 40 and moves the latter toward the stationary jaw 35 whereby the teeth 36 and 45 bite into the insulation of the wire whereupon, with further pull on V handle 51, arm 32and handle 51 move together in unison and the wire ismoved therewith, the arm 32 pivoting on its mounting or bearing post 31,. whereby the wire is retracted or pulled back through the guide 25 causing the knives to strip a vpredetermined length Aof insulation therefrom. Re- Y lease of handle 51 will then enable the spring 33 toreturn the arm 32 to full lineposit-ion of Fig. 1, whereupon the bumper 54 will abut the stop 55. The spring 46 meanwhile acts on slidable gripping jaw 40 to urge kthe latter to rotate the cam 48 counterclockwise (Fig. l), thus separating the jaws 40 and 35 suficiently to permit the wire thus stripped of a portion of its insulation to be drawn out of guide 25 and the stripped portion to be pulled through aperture 27.

To limit and gauge the movement of .the

arm 32 I provideY an adjustable stop arm 58 which is slidable and rotatable in a boss 59 formed on the'V base 10, this stop 58 having an angled end 60 against which the arm 32 will abut (Fig. 3) when the portion 60 is upright. A set screw'61 is provided to se-Y cure the stop arm 58 in various positions and thus vary the movement permitted arm 32.

vIn the modification shownin Figs.V 7 to 9 inclusive, those parts of the invent-ion that are similar to parts hereinbefore described are given the reference numerals already employed, and other reference numerals are given to those parts that distinguish this from the form of the invention shown in Figs. 1 to 6.

VOn al post 62 that projects ,above the base 10 an arm 63 is pivotally mounted, as by a screw'64. Thisr arm 63 is so arranged that one end portion 63a thereof (Fig. 7) is abutted by a surface 65 ofthe arm 32a, which is similar to the arm 32, except as hereinafter pointed out, when the arm 32a 7 At this time the other end portion 63?) abuts one of the knives 412 and, since the knives 12 move in unison or synchronism, they are thus held apart, asin Fig. 7, ready for Vthe insertionl therebetween of an insulated wire such as 57. `Inthis form ofthe invention the guide 25 and its supporting-bracket 23 are eliminated and the cap plate 41is split or made in two sections (Fig. 7 to provide a passage 66 through which the wire 57 may be inserted between the knives 12. I-As the arm 32a is rotated by handle 51 clockwise (Fig. 7 aboutits pivot 81, and the slidable gripping jaw 40 is moved by cam 48 toward jaw 35, the surface is moved awayfrom the portion 63a. of the arm 63 thus'freeing the arm ,63, whereupon the spring 18 rotates the gears 15 and posts 11 to move the knives 12 into parallel relation while at the same time the teeth 36 and 45 grip the insulated wire and the arm 32a pulls the same to cut and strip or peel back a portion of the insulation therefrom.

On a portion 67 which projects rabove the base 10 the stationary part 68 of an extensible guide is mounted to direct the wire between the knives, said guide including a movable element 69 which is slidably joined to the part 68 by pin and slot connections 70. Y This guide is open at both ends and an insulated wire orA the like may therefore be placed on the guide so as to extend between the knives l2 and through passage 66, whereupon a portion of the insulation disposed between, and at some distance from the ends of the conductor may be cut and stripped or peeled back by moving handle 51, arm 32a, and slidable aw 40, in the manner hereinbefore described.

71 indicates a socket wrench for the socket headed bolts or screws 14 and like parts.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this isV capable of variation and modification without departing from the Y spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but

desire to avail myself of such variations and Vmodifications as come within the scope of the Y appended claims.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A device of the character described, comprising a base, rotatable elements on the base, stripping knives carried by the rotatable elements, means constraining said elements and knives to rotate in unison, an arm pivotally mounted on the base, a slidable jaw and a relatively stationary jaw carried by said arm adapted to grip an object and pull the same between the knives, a rotatable cam eccentrically mounted on said arm to move said slidable jaw toward said stationary jaw, a handle attached to said cam for moving the same, and stops on said arm limiting movement of said handle relative to said arm.

2. An insulation stripping device comprising a base, rotatable elements on the base, stripping knives carried by said elements, means constraining the knives and said elements to rotate in unison, an arm pivotally mounted' on said base, a pair of gripping aws on said arm one slidable relative to the other,` and means movably mounted on said arm having limited movement relative thereto to first move said slidable jaw'toward said' other jaw and to then move said arm.

3. A device for stripping insulationfrom wires and the like, comprisinga base, rotatable elements on the base, stripping knives carried by said elements, means constraining the knives and said elements to rotate in unison, a member pivotally mounted 0n the base, gripping means including a slidable gripping jaw carried bysaid member, a rotatable cam Carried by said pivotal member to operate said jaw, and a handle attached to said cam having limited movement relative to said pivotal member.

4. A device of the character Vdescribed base, gripping means carried by the arm includinga slidable gripping jaw,ja rotative cam eccentrically mounted on said arm for operating said slidable jaw, and a handle att-ached to said cam having limited movement relative to said arm. i

6. A device of the character described comprising a base, rotatable elements journaled in the base, stripping knives carried by'said elements, means constraining the knives and said elements to rotate vin unison, ran arm pivotally mounted on the base, a slidable grippingjaw carried by the arm, a gripping jaw carried by the arm relatively stationary withrespect to the slidable jaw, a rotative cam carried by the arm to moveV the movable jaw toward the station-V ary jaw, and a handle attached to the cam having 'limited movement relative to` said arm. Y y j Y 7. A device for stripping insulation from wires and the like comprising a base, rotatable elements on the base, stripping knives carried by said elements, an arm pivotally mounted on the base, a relatively stationary gripping jaw carried by the arm, a slidable gripping jaw carried by the arm, a handle onthe Aarm having limited movement relative thereto,an'd a cam attached to the handle to move the slidable jaw toward the relatively stationary jaw'.

8. A device for stripping insulation from wires and the likecomprising a base,vrotaty able elements'on the base, stripping knives carried by said elements, means constraining the knives to rotate in unison, an arm ypivotally mounted on the base including a guideway, a pair of gripping jaws carried yby the arm in thequideway adapted to have the wire inserted therebetween and one of said jaws being slidable in the guideway relative to the other of said jaws, a cam eccentrically mounted on said arm to move the slidable jaw toward said other jaw, and a handle attached to the cam having limited movement relative to said arm.

9. A device for stripping insulation from wires and the like comprising a base, rotat-V able elements on the base, stripping knives carried by said elements means constraining the knives to rotate in unison, an arm pivotally mounted on the base, a relatively stationary gripping member carried by the arm, a slidable gripping member carried by the arm, a pivotal cam eccentrically mounted on the arm to move the slidable gripping member toward the stationary gripping member, and stops on said arm limiting movement of said handle and cam relative to said arm.

10. A device for stripping insulation from wires and the like comprising a base, rotatable elements on the base, stripping knives `carried by said elements, an arm'pivotallyl mounted on the base, a relatively stationary gripping member carried by the arm, a slid- Vable gripping member carried by the arm,

a pivotal handle carried by the arm, having limited movement relative thereto and a cam carried by the arm attached to the han- Y arm, a rotative cam eccentrically mounted on the arm to move the slidablegripping Varm pivotally mounted on the base,.a relatively stationary gripping member carried .by the arm, a slidable gripping memberrcar-y ried by the arm, a handle to move the arm, a cam carried by the'arm and operated by the handle to move the slidable gripping member toward the stationary gripping member whereby to grip a portion of the wire ldisposed between said members and pullvthe wire between the knives, and a pivot-al member engaged by the arm when in non-operating position and having a portion bearing against one of the knives to keep the knives spread apart for the insertion therebetween of `the wire. Y

' In testimony lwhereof I affix my signature.

ALFRED N. WENTINK.

member toward the stationary gripping Y member, a handle attached to thercam, and means carried by the arm to limit movement of said cam and handle relative to said arm.

l2. An insulation stripping device, comprising a base, stripping knives, Van arm pivot-ally mounted on the base, a relatively Vstationary gripping member carried by the arm, a slidable gripping member carried by the arm, a cam movably Vmounted on the arm to move the slidable gripping member toward thek stationary gripping member, and 

